Bucket control for backhoe



Nov. 30, 1965 J. 5. PILCH BUCKET CONTROL FOR BACKHOE 3 Sheets-Sheet 1 Filed March 7, 1963 INVENTOR.

Jor'i N 3. Pl LCH BY p ATTOPNEY Nov. 30, 1965 J. 5. PILCH 3,220,578

BUCKET CONTROL FOR BACKHOE Filed March '7, 1965 3 Sheets-Sheet 2 Fig.3

INVENTOR.

JOHN S. "PH-C.

United States Patent 3,220,578 BUCKET CONTRGL FOR BACKHOE John S. Pilch, Ware Machine Works, Inc., P.0. Box 140, Ware, Mass. Filed Mar. 7, 1963, Ser. No. 263,595 3 Claims. (Cl. 214138) This invention relates to trenchers, backhoes, or the like, and has particular reference to the provision of new and improved means for varying the speed and the power of such apparatus by adjusting the bucket pivot relation.

At certain times during the operation of a trencher, backhoe, or the like, additional power is desired. At certain other times during the operation of such apparatus, additional speed is desired.

It is an object of the present invention to provide new and improved means of the type set forth, which new and improved means supplies this additional power, when desired, and this additional speed, when desired.

Another object of the invention is to provide new and improved means of the type set forth which supplies this additional speed or power by adjusting the bucket pivot relation.

Another object of the invention is to provide new and improved means of the type set forth which adjusts the bucket pivot relation in minute increments.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that changes may be made in the details of construction and arrangement of parts shown and described, as the preferred forms of the invention have been given by way of illustration only.

Referring to the drawings:

FIG. 1 is a side view of a form of the invention in operative position with a trencher;

FIG. 2 is a sectional view taken on line 2-2 of FIG. 1, looking in the direction of the arrows;

FIG. 3 is a sectional view taken on line 3-3 of FIG. 2, looking in the direction of the arrows;

FIG. 4 is a fragmentary view taken on line 4-4 of FIG. 2, looking in the direction of the arrows;

FIG. 5 is a fragmentary sectional view showing a modified form of the invention; and

FIG. 6 is a sectional view taken on line 6-6 of FIG. 5, looking in the direction of the arrows; and

FIG. 7 is a view illustrating an alternative form of the invention.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout, the device shown in FIGS. 1-4 comprises a boom 10 pivotally connected at 11 to a support 12 which, in turn, is pivotally connected at 13 to a tractor or the like, which tractor or the like supplies hydraulic power for the operation of the device. The end of the boom 10 opposite to that pivotally connected to said support 12 is pivotally connected at 14 to the dipper stick 15, which dipper stick 15 may be of any conventional type.

Boom 10 is adapted to be raised and lowered by the hydraulic jack 16 which is connected adjacent its opposite ends at 17 and 18 to the boom 10 and the support 12, respectively.

The dipper stick 15 is pivoted by means of the hydraulic means 19, which hydraulic means 19 is pivotally connected at 20 and 21 to the dipper stick 15 and the boom 10, respectively.

The bucket support 21 is pivotally connected at 22 to the dipper stick 15 and carries the bucket 23. Grooves or slots 24 are positioned within said bucket support 21.

Within said grooves or slots 24 are slidably mounted the opposite ends a and 3012 with slide member 30 3,220,578 Patented Nov. 30, 1965 "Ice adapted to be moved by hydraulic means 25, said hydraulic means 25 comprising a cylinder 26 connected at 28a to a support 28 on bucket support 21 and a ram 27 connected at 29 to a slidable member 30. Said hydraulic means 25 is operatively controlled by the hydraulic lines 31 located adjacent to the dipper stick 15.

The slidable member 30 is pivotally connected adjacent its opposite ends 30a and 30b at 32 to a link 33, which links 33 are pivotally connected at 34 to the ram 35 of the bucket-rotating hydraulic means 36. Second links 37 are pivotally connected at 34 and 38 to the ram 35 of said hydraulic means 36 and dipper stick 15, respectively.

Said hydraulic means 36 includes the ram 35 pivotally connected at 34 to the links 33 and the second links 37 and the cylinder 39 pivotally connected at 40 to the dipper stick 15.

The form of invention illustrated in FIGS. 5 and 6 is substantially similar to that described with relation to FIGS. 1-4, except that the slidable member 30 is pivotally connected to the links 33 adjacent its rear surface, rather than adjacent its opposite ends 30a and 30b, as in the form of invention illustrated in FIGS. 14.

With reference to FIG. 7 of the drawings, such illustrates an alternative form of the invention with utilizes a screw or bolt 41 and a nut 42 to make the desired adjustment, in minute increments.

It will be seen that, through the means provided by the present invention, adjustment may be made of the bucket pivot relation in minute increments.

It is understood that the present invention will be operative whether or not the links 33 and 37 are used in construction.

Furthermore, it will be understood that the extension or retraction of the pivot points may be performed by means other than the hydraulic cylinder illustrated as, for ex ample, by screw and nut means.

The operation of the device is believed to be apparent from the foregoing description.

From the foregoing it will be seen that I have provided new and improved means for adjusting the bucket pivot relation in minute increments.

From the foregoing it will be seen that I have provided new and improved means for accomplishing all of the objects and advantages of the invention.

I claim:

1. In a device of the character described, a boom, a dipper stick pivotally connected to said boom, a bucket pivotally connected to said dipper stick, means for pivoting said bucket relative to said dipper stick, said means comprising hydraulic means operatively connected to said bucket and to said dipper stick, and an adjustable pivot on said bucket and operatively connected to said hydraulic means, and hydraulic means for adjusting the position of said adjustable pivot and the distance between said adjustable pivot and the pivot connection between said bucket and said dipper stick.

2. In a device of the character described, a boom, a dipper stick pivotally connected to said boom, a bucket pivotally connected to said dipper stick, means for pivoting said bucket relative to said dipper stick, said means comprising hydraulic means operatively connected to said bucket and to said dipper stick, and an adjustable pivot on said bucket and operatively connected to said hydraulic means, said adjustable pivot being carried by a slidable member, and means for sliding said slidable member and thereby adjusting the distance between said adjustable pivot and the pivot connection of said bucket to said dip-per stick.

3. In a device of the character described, a boom, a dipper stick pivotally connected to said boom, a bucket support pivotally connected to said dipper stick, a bucket carried by said bucket support, means for pivoting said bucket relative to said dipper stick, said means comprising hydraulic means pivotally connected to said bucket support and means for adjusting the position of the pivot connection of said hydraulic means to said bucket support in minute increments, said latter means including screw and nut means for adjusting the distance between said pivot connection of said hydraulic means to said bucket support UNITED STATES PATENTS 1,410,201 3/1922 Lutz 214-137 2,802,584 8/1957 Przybylski 214-138 2,813,645 11/1957 Pilch 214138 HUGO O. SCHULZ, Primary Examiner. 

1. IN A DEVICE OF THE CHARACTER DESCRIBED, A BOOM, A DIPPER STICK PIVOTALLY CONNECTED TO SAID BOOM, BUCKET PIVOTALLY CONNECTED TO SAID DIPPER STICK, MEANS FOR PIVOTING SAID BRACKET RELATIVE TO SAID DIPPER STICK, SAID MEANS COMPRISING HYDRAULIC MEANS OPERATIVELY CONNECTED TO SAID BUCKET AND TO SAID DIPPER STICK, AND AN ADJUSTABLE PIVOT ON SAID BUCKET AND OPERATIVELY CONNECTED TO SAID HYDRAULIC MEANS, AND HYDRAULIC MEANS FOR ADJUSTING THE POSITION OF SAID ADJUSTABLE PIVOT AND THE DISTANCE BETWEEN SAID ADJUSTABLE PIVOT AND THE PIVOT CONNECTION BETWEEN SAID BUCKET AND SAID DIPPER STICK. 